Improved machine for making tin-lined lead pipe



'E.GHU BBU"GK.. MACHINE IOR MAKING TIN LINED LEA-D PIPEL.

Patented July 7,1868;

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t UNITED STATES PATENT OFFICE.

S. E. GHUBBUGK,-OF BOSTON MASSAOHUSETTS, ASSIGNOR TOJ. H.

'C'HADWIOK, OF SAME PLACE.

Specification forming part of Letters Patent No. 79,548, dated July 7,18 68.

To all whom it may concern: Be it known that I, S. E.GHUBBUcK, ofBoston, in the county of Suffolk and State of Mes sachusetts, haveinvented certain Improve" ments in Machinery for Making Compound Pipe;and I do hereby declare that the-follow; ing is a full and exactdescription thereof, reference being bad to the accompanying drawings,and to'the letters of reference marked thereon.

With reference to the accompanying draw- .in gs, Figure l is a sectionalview of those parts of a. machine to which-my improvementsrelate. Fig. 2is asimilar sectional view, showing the material introduced and the pipein process of making. Fig. 3 is a section at line A. Fig. 4 is a sectionat line B.

In the drawings, a is the cylinder toreceive the material, and b c theram or follower.

D is an annular partition, stationary with reference to the cylinder a,and dividing the space within cylinder a and around mandreleproportionately to the required relative thickness of the two metalstocompose-the pipe.

. The two parts I) and c of the rani or follower are firmly secured toeach other or to a suitable cross-head, f, while the annularpartition 1) is firmly secured by any suitable means, as rods g and headIt, to the cylinder (1.

The operation is as follows; Any suitable stopper is placed in die j andthe lower end of the space between partition D and mandrel 0, afterwhich the different metals, in a fused or melted state, are poured, theone which forms the inner or-lining portion through the opening iin thepartition into the space within the partition D, and around mandrel e,and the other, for the exterior portion of the pipe, into the space Itsurrounding partition D and within the cylinder, after which, hydraulicor other pressure being applied at l, the ram or follower b c-beingstationary or the reverse, pressure being applied to ram or follower bc, and the cylinder to being stationary-in either case the metals areforced out through the die j in properly-proportioned compound pipe.After the first discharge, the ram or follower b c not bein g forcedquite to the bottom of the cylinder, the opcnin g will be alreadystopped for receiving anotherehargc when the ramis withdrawn.

The withdrawingof the rannas well as its inward movement, may also "-beetfectcd. by. means of the usual hydraulicorother pressure.

The metals being separated while in afused state'by the partition (1,therein no danger of theirinterinixing in an objvctionable manner.

The advantageof a considerable saving of time is also secured in beingenabled tointroduce both metals at once, or without changing therelation of any ofthe parts.

The materials for the construction of my improved machinery may be iron,steel, or other metals, as may appear most suitable for the severalparts to those conversant with and practicing the art.

I do not claim the cylinder, ram, or mandrel of themselves"separately,nor the same asaa, "combination, for both devices and theircombinationare old anti well known nor do Iclaim a sheath or annular partition as ameans simply of preventing the lead, when poured, from coming in contactwith the tin, tor this is accomplished in the machine patented to JohnFarrell, February 25, 1868, in which a sheath is used to protect the tinfrom the injurious ef-' fects of the hot lead, but which, after the leadhas been poured, is entirely removed from the machine, thus leaving avoid-space between the two ingots, and the latter to that extentunsupported; but

What I do claim is- 1. The combination of the annular fixed partition -Dwith the cylinder, ram, and die, when all are arranged in relation oneto another as and so as to operate in the manner described.

2. The construction and adaptation one to the other and to the mandrelof the ram and annular partition D, as shown and described.

S. E. GHUBBUCK. Witnesses v I. D. SPAULDING, v

D. N. B. OoFFIN, Jr.

